It's a Secret(2000)

Himitsu na Koto

Her parents divorced when her mother, a painter, took a female lover. She tries to prove that she is different from her mother by giving her body to a man. However, for some reason, her heart refuses to budge. However, she begins to feel something different about Yugo, a man she met by chance...

(Source: Shogakukan, translated)

Included Stories:
1. ヒミツなこと
2. やわらかな雨
3. 神さまのローズ
4. 桜の日